Wire and cable refers to wire products that transmit electrical (magnetic) energy, information and achieve electrical (magnetic) energy conversion. China's wire and cable products are divided into the following five categories according to their use

1. Bare wires

2. Winding wire

3. Power cable

4, communication cables and communication optical cables

5, electrical equipment with wire and cable

Electrical equipment with wire and cable is traditionally divided into eight categories according to product use:

5.1, low-voltage distribution wire and cable

5.2. Signal and control cable

5.3. Instrument and equipment connection cable

5.4, transportation wire and cable

5.5, geological resources exploration and mining wire and cable

5.6, DC high voltage cable

5.7. Heating cable

5.8, special wire and cable

Although the cable is divided into many categories according to different uses, all wire and cable from zero to one, can not be separated from a constant link, that is, from the conductor processing, it is necessary to add layer by layer insulation, shielding, cable, protective layer on the periphery of the conductor to make wire and cable products. The more complex the product structure, the more layers are stacked.

The following with Qingdao cable manufacturers to look at the production process of wire and cable.

1. Copper, aluminum monofilament drawing

Wire and cable commonly used copper and aluminum rods, at room temperature, the use of wire drawing machine through one or several drawing mold holes, so that its section is reduced, the length is increased, the strength is increased. Wire drawing is the first process of each wire and cable company, and the main process parameter of wire drawing is die matching technology.

2. Advantages of monofilament annealing?

Copper and aluminum monofilaments are heated to a certain temperature and recrystallized to improve the toughness and reduce the strength of the monofilament to meet the requirements of conductive wire and cable cores. The key of the annealing process is to prevent the oxidation of the copper wire.

3. What is the function of the stranding of conductors?

In order to improve the softness of the wire and cable for easy installation, the conductive wire core is twisted by several single wires. According to the form of stranding of conductive wire core, it can be divided into regular stranding and irregular stranding. Irregular stranding is divided into bundle stranding, concentric double stranding, special stranding and so on.

In order to reduce the occupied area of the wire and reduce the geometric size of the cable, the compact form is adopted while the twisted conductor, so that the ordinary circle is changed into a semi-circle, a fan, a tile shape and a compact circle. This conductor is mainly used in power cables.

4. Insulation extrusion, plastic wire and cable mainly use extruded solid insulation layer, plastic insulation extrusion of the main technical requirements:

4.1. Eccentricity: the deviation value of the extruded insulation thickness is an important sign of the extrusion process level, and most of the product structure size and its deviation value are clearly specified in the standard.

4.2. smoothness: the surface of the extruded insulation layer should be smooth, and there should be no bad quality problems such as rough surface, burning and impurities.

4.3 Density: the cross section of the extruded insulation layer should be dense and strong, and no pinholes visible to the naked eye should be allowed to eliminate the existence of bubbles.

5. The cable process needs attention, for multi-core cables in order to ensure the degree of molding and reduce the shape of the cable, it is generally necessary to twist it into a circle. The mechanism of stranding is similar to that of conductor stranding, because the stranding joint diameter is large, most of them adopt non-torsion mode. The technical requirements of cable forming: first, to prevent the twisting and bending of the cable caused by the turning of the special-shaped insulated wire core; The second is to prevent the insulation layer from being scratched. Most of the cables are accompanied by the completion of two other processes: one is filling to ensure the roundness and stability of the cable after the cable is formed; One is to tie, to ensure that the cable core is not loose.

6. The role of the inner sheath, in order to protect the insulated wire core from being sheathed, the insulation layer needs to be properly protected, the inner sheath is divided into: extruded inner sheath (isolation sheath) and wrapped inner sheath (cushion). The wrapping pad is carried out simultaneously with the cabling process instead of the lashing tape.

7. The role of armor is to better protect the cable laid underground, because the cable may withstand a certain positive pressure, at this time you can choose the inner steel tape armor structure. There is also a case that if the cable is laid in both positive pressure and tension situations (such as water, vertical shafts or soil with a large drop), the structural type with internal steel wire armor should be selected.

8. The outer sheath is the structural part of the insulation layer that protects the wire and cable to prevent the erosion of environmental factors. The main function of the outer sheath is to improve the mechanical strength of the wire and cable, prevent chemical corrosion, moisture-proof, waterproof immersion, and prevent cable burning. According to the different requirements of the cable, the plastic sheath is directly extruded by the extruder.

Qingdao cable manufacturer: The relevant information about the wire and cable production process is introduced here. I hope this article will be helpful to you.

Qingdao Tianxing Cable Co., Ltd. focus on supporting wire and cable production customization manufacturers, main: exports to more than 40 countries and regions around the world, the annual production capacity of 1 billion yuan. 6000 square meters of storage, standing hundreds of millions of inventory, order demand for rapid distribution and delivery, large prices more favorable. Qingdao cable manufacturer hotline: 16678668098